Lens with divergent structure and backlight module incorporating the same
US9097395B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 28, 2013 |
| Grant date | Aug 4, 2015 |
| Priority date | — |
| Expiry date | Nov 28, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B19/0061
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A lens includes a main lens and a divergent structure positioned on the top of the main lens. The main lens has a light incident surface for receiving light generated by an LED light source and a light exit surface opposite to the light incident surface. The divergent structure includes a plurality of annular micro lenses each having a triangular shape in cross section. The micro lenses are arranged in a series of concentric circles with regard to a center point located on an optical axis of the main lens. Each micro lens includes an inner surface and an outer surface connected with the inner surface. The inner and outer surfaces define an angle therebetween, which is increased gradually from the center point toward a periphery of the light exit surface. A backlight module using the lens is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.